SmartEquine Smart & Simple Magnesium Oxide Powder Horse Supplement, 3-lb bag

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About This Item

Details

  • This supplement provides 5,000 mg. of magnesium oxide per serving.
  • You’ll be happy to know that magnesium oxide can help promote a calm demeanor in horses.
  • Plus, this useful supplement also supports healthy muscles.
  • Help your horse maintain proper metabolic and nervous system function with this supplement.
  • This powder horse supplement features one main ingredient for simple and effective supplementation.

Ingredient Information

Feeding Instructions

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Questions & Answers

1 Customer Questions

How many days is each bag

Answer by Chewy • Jun 25, 2025
There are approximately 154 servings per 3-lb bag and about 515 servings per 10-lb bag.
Reviews
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4.8
Rated 4.8 out of 5 stars
39 Ratings
Terms & Conditions

11 Customer Reviews

Rated 4 out of 5 stars
By Debby on Jan 8, 2026

good quality supplement

it seems to helping my horse but I wish it had a better container, the plastic with zip is not a good idea for heavy supplements and especially cold days, which

it seems to helping my horse but I wish it had a better container, the plastic with zip is not a good idea for heavy supplements and especially cold days, which make it hard to zip, and that is the reason for the 4 star review.

Rated 5 out of 5 stars
By Megan on Jul 30, 2025

So cost effective

Got 10lbs for the price of two months of this from SmartPak! Set for over a year for such a good price. I also like that this provides the same amount of magnesium

Got 10lbs for the price of two months of this from SmartPak! Set for over a year for such a good price. I also like that this provides the same amount of magnesium in a much smaller scoop than other brands that I have used, less powder in her food = happier pony! It would be better if this came in a tub instead of a zip bag (I don’t think it would hold up for over a year of opening and closing every few weeks, I prepack my own supplements) so I did have an old container that had powder in that I dumped this into

Rated 1 out of 5 stars
By Renee on Dec 30, 2025

I live in CA it took

I called and they weren’t sure why it was like that

I called and they weren’t sure why it was like that

Rated 5 out of 5 stars
By Brittany on Aug 28, 2025

Loveeee.

Love this for all my ponies, and super affordable! Ships fast. Will forever use this product.

Love this for all my ponies, and super affordable! Ships fast. Will forever use this product.

Rated 5 out of 5 stars
By Susan on May 22, 2025

Exactly what we need and no more

I live in Michigan where the soil composition means horses fed local hay are magnesium deficient. This product provides exactly what I need to supplement my young

I live in Michigan where the soil composition means horses fed local hay are magnesium deficient. This product provides exactly what I need to supplement my young horse’s diet. I really like that it’s straight up magnesium with nothing more.

Rated 5 out of 5 stars
By Teri on Sep 27, 2025

Mule needs.!!

Excellent service no excuses timely thank you

Excellent service no excuses timely thank you

Rated 5 out of 5 stars
By Sandra on Jul 13, 2025

Fast service

Never yet had to send anything back with what I ordered. Great company

Never yet had to send anything back with what I ordered. Great company

Rated 5 out of 5 stars
By Taylor on Jan 17, 2025

Awesome price!

It has been difficult to find magnesium oxide for my horse since the Uckele one disappeared from the market last year. I was impressed by the price of this, and

It has been difficult to find magnesium oxide for my horse since the Uckele one disappeared from the market last year. I was impressed by the price of this, and it is definitely the same product as the Uckele one was. Buying the MGO in bulk saves a lot of money!

Rated 5 out of 5 stars
By malai on Mar 24, 2025

Great product

Just wanted Magnesium, so glad to C ind this, will last for quite awhile!

Just wanted Magnesium, so glad to C ind this, will last for quite awhile!

Rated 5 out of 5 stars
By Kathy on Jun 22, 2025

Large package for cost

Horses eating it in their feed.

Horses eating it in their feed.